منابع مشابه
Trapping by clusters of traps
We study how the trapping kinetics is modified when traps are gathered in clusters. Recently, we have proposed a mean-field theory of trapping by clusters of traps valid at the initial stage of the process [J. Chem. Phys. 111, 711 (1999)]. Here by using the optimal-fluctuation method we incorporate fluctuation effects in the theory and discuss the manifestation of trap clustering in the kinetic...
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Under suitable conditions, a DNA molecule in solution will develop a strong electric dipole moment. This induced dipole allows the molecule to be manipulated with field gradients, in a phenomenon known as dielectrophoresis (DEP). Pure dielectrophoretic motion of DNA requires alternate current (AC) electric fields to suppress the electrophoretic effect of the molecules net charge. In this paper,...
متن کاملOptical Trapping by Radiometric Flow
Micron sized, neutral, non-dielectric particles immersed in a viscous fluid such as an ideal gas can be trapped in the focal plane of a Gaussian beam. A particle can absorb energy from such a beam with a large radial intensity gradient, resulting in substantial temperature gradients and a radiometric torque which causes it to spin rapidly about an axis perpendicular to the flux of radiant energ...
متن کاملPhenolics from Brazilian Propolis
Propolis, or bee glue, is a complex resinous mix ture of plant-derived products collected and used by bees as a general purpose sealer and antibiotic in their hives. It is reported to exhibit a broad spectrum of biological activities, including antibac terial, antiviral, antiinflammatory, cytotoxic etc. (Marcucci, 1995). It is widely used in folk medicine and also as an ingredient in “herbal”...
متن کاملInhibition of dextransucrase activity in Streptococcus mutans by plant phenolics.
Streptococcus mutans is responsible for causing dental caries in humans and utilizes sucrose for its growth. The dextransucrase (EC 2.4.1.5) is responsible for sucrose metabolism, which exhibits both hydrolytic and glucosyltransferase activities. In this study, we examined the effects of the plant phenols, namely gallic, tannic and syringic acids and aqueous extracts of certain traditionally us...
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ژورنال
عنوان ژورنال: Food Chemistry
سال: 2018
ISSN: 0308-8146
DOI: 10.1016/j.foodchem.2018.04.121